Title :
Frequency tunable zeroth-order resonant antenna by using RF MEMS on slotted ground plane
Author :
Jang, Youngsoo ; Choi, Jaehyurk ; Lim, Sungjoon
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea
Abstract :
In this paper, a frequency tunable zeroth-order resonant (ZOR) antenna has been implemented. The ZOR characteristics of the proposed antenna is realized by using the composite right-and left-handed (CRLH) transmission line which is realized by way of a rectangular slot on the ground plane of mushroom structured antenna in order to minimize the antenna size. In addition, the RF MEMS switches are introduced on the slotted ground plane for frequency tuning capability. Depending on the on and off states of the tunable device on the slotted ground plane, a shunt inductance value of the CRLH transmission line is changed and its resonant frequency becomes tunable. From the experimental results, the resonant frequency of the proposed antenna is changed from 4.92 GHz to 2.96 GHz. Additionally, the proposed antenna´s size is reduced by 94.24 % compared with the conventional half-wavelength patch antenna.
Keywords :
UHF antennas; metamaterials; microstrip antennas; microswitches; CRLH transmission line; RF MEMS switches; ZOR antenna; composite right-and left-handed transmission line; frequency 4.92 GHz to 2.96 GHz; frequency tunable zeroth-order resonant antenna; frequency tuning capability; half-wavelength patch antenna; mushroom structured antenna; on-off states; resonant frequency; shunt inductance value; slotted ground plane; Antennas; Micromechanical devices; Radio frequency; Resonant frequency; Switches; Metamaterial; RF MEMS; reconfigurable antenna; tunable antenna; zeroth-order resonance (ZOR) antenna;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
